Malicious PDF — malware analysis report

Static analysis result for SHA-256 abed44b7cd4cbf03…

MALICIOUS

PDF

80.2 KB Created: 2021-02-13 03:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c702f781266ec176c3ea9dce590b6eb5 SHA-1: a2e2dc612ed74c7ec48c4d702a749eca0abde2e9 SHA-256: abed44b7cd4cbf03d5aa20098f787865e2e473dcf446010edbd21bc40c3ea83a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or redirection mechanism. The primary URL, 'https://maypoin.ru/123', is likely used for phishing or to serve a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/123?utm_term=short+rhyming+riddles+with+answers PDF link annotation
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/dawuwinuviz.pdfIn PDF document text
    • https://kitabenulo.weebly.com/uploads/1/3/0/9/130969432/tegegamagekijawuv.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/poxiwanodiw-xutesafuxi-komegut.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/1919145.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/misavoxazefifubuzub.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/3bc2228ab844a.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/59db010f08b.pdfIn PDF document text
    • https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/5d2251.pdfIn PDF document text
    • https://lufufalab.weebly.com/uploads/1/3/4/6/134634403/fobojalajupito-gomowosujeled.pdfIn PDF document text
    • http://gikiwasixe.66ghz.com/antalgic_gait_adalah.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvazi/excel_online_templates_for_mac.pdfIn PDF document text
    • http://nugikefabepumuk.epizy.com/nugetifekuguvemoxufilogu.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/zero_belly_fat_diet.pdfIn PDF document text
    • http://fikakoba.rf.gd/xenesabiviga.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/pobex.pdfIn PDF document text
    • http://zofekaxezujujom.rf.gd/relation_of_voltage_and_current_in_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/commandos_2_free_full_version_pc.pdfIn PDF document text
    • http://xibogowidam.epizy.com/33274964781.pdfIn PDF document text
    • http://rurulaburasi.epizy.com/cgaffinetransform_swift_3_example.pdfIn PDF document text
    • http://bokatamekal.rf.gd/1020_cold_rolled_steel_sheet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB2 5536 bytes
SHA-256: 52b1e41056099b2c247338a7c977b63e9d0a083c55de0bf9431e473179067e55
font_01_sfnt_off00010e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E69 10984 bytes
SHA-256: 3c59fbb0e4605f2a1f252c45afad49ae04836baf14ff826b3eb5cb735a2cafc1

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